<?php
/**
 * Created by PhpStorm.
 * User: 雨寒
 * Date: 2017/11/23
 * Time: 下午1:28
 */
namespace app\common\model;

use think\Cache;
use think\Model;
use app\common\model\Order;
use app\common\model\DeveloperException;
class WeixinPay extends Common
{
    //下单APP
    public function getPrePayOrder($body, $out_trade_no, $total_fee,$notify='')
    {

        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        if(empty($notify)){
            $notify_url = config('weixinpay.notify_url');//回调地址
        }else{
            $notify_url = $notify;//回调地址
        }

        $onoce_str = $this->createNoncestr();

        $data["appid"] = config('weixinpay.appid');
        $data["body"] = $body;
        $data["mch_id"] = config('weixinpay.mch_id');
        $data["nonce_str"] = $onoce_str;
        $data["notify_url"] = $notify_url;
        $data["out_trade_no"] = $out_trade_no;
        $data["spbill_create_ip"] = $this->get_client_ip();
        $data["total_fee"] = $total_fee*100;
        $data["trade_type"] = "APP";
        $sign = $this->getSign($data);
        $data["sign"] = $sign;
//        throw new DeveloperException(json_encode($data));
        $xml = $this->arrayToXml($data);
        $response = $this->postXmlCurl($xml, $url);
        //将微信返回的结果xml转成数组
        $response = $this->xmlToArray($response);
        return $response;
    }

    /**
     * jsapi支付下单
     * @param $body
     * @param $out_trade_no
     * @param $total_fee
     * @param string $notify
     * @param $openid
     * @return array|bool|false|mixed
     */
    public function getPrePayOrder2($body, $out_trade_no, $total_fee,$notify='',$openid)
    {

        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        if(empty($notify)){
            $notify_url = config('weixinpay.notify_url');//回调地址
        }else{
            $notify_url = $notify;//回调地址
        }

        $onoce_str = $this->createNoncestr();

        $data["appid"] = config('wechat.appid');
        $data["body"] = $body;
        $data["mch_id"] = config('weixinpay.mch_id');
        $data["nonce_str"] = $onoce_str;
        $data["notify_url"] = $notify_url;
        $data["openid"] = $openid;
        $data["out_trade_no"] = $out_trade_no;
        $data["spbill_create_ip"] = $this->get_client_ip();
        $data["total_fee"] = $total_fee*100;
        $data["trade_type"] = "JSAPI";
        $sign = $this->getSign($data);
        $data["sign"] = $sign;
//        throw new DeveloperException(json_encode($data));
        $xml = $this->arrayToXml($data);
        $response = $this->postXmlCurl($xml, $url);
        //将微信返回的结果xml转成数组
        $response = $this->xmlToArray($response);
        return $response;
    }

    /**
     * @param $Obj
     * @return string
     */
     public function getSign($Obj){

        foreach ($Obj as $k => $v){
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //echo '【string1】'.$String.'</br>';
        //签名步骤二：在string后加入KEY商务平台的key
        //$String = $String."&key=6c5cab751018443adac8773128b82f0a";
        //微信支付商户平台 - 账户中心 - 账户设置 - API 安全 - API 密钥 - 设置密钥
        $String = $String."&key=".config('weixinpay.api_key');
        //echo "【string2】".$String."</br>";
        //签名步骤三：MD5加密
        $String = md5($String);
        //echo "【string3】 ".$String."</br>";
        //签名步骤四：所有字符转为大写
        $result_ = strtoupper($String);
        //echo "【result】 ".$result_."</br>";
        return $result_;
    }


    /**
     *  作用：产生随机字符串，不长于32位
     */
     public function createNoncestr( $length = 32 ){
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str ="";
        for ( $i = 0; $i < $length; $i++ )  {
            $str.= substr($chars, mt_rand(0, strlen($chars)-1), 1);
        }
        return $str;
    }


    //数组转xml
    public function arrayToXml($arr){
        $xml = "<xml>";
        foreach ($arr as $key=>$val){
            if (is_numeric($val)){
                $xml.="<".$key.">".$val."</".$key.">";
            }else{
                $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
            }
        }
        $xml.="</xml>";
        return $xml;
    }


    /**
     *  作用：将xml转为array
     * @param $xml
     * @return array|false
     */
    public function xmlToArray($xml){
        //将XML转为array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $array_data;
    }


    /**
     *  作用：以post方式提交xml到对应的接口url
     *
     */
    public function postXmlCurl($xml,$url,$second=30){
        //初始化curl
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
        //返回结果

        if($data){
            curl_close($ch);
            return $data;
        }else{
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error"."<br>";
            curl_close($ch);
            return false;
        }
    }


    /*
    获取当前服务器的IP
    */
    public function get_client_ip(){
        if ($_SERVER['REMOTE_ADDR']) {
            $cip = $_SERVER['REMOTE_ADDR'];
        } elseif (getenv("REMOTE_ADDR")) {
            $cip = getenv("REMOTE_ADDR");
        } elseif (getenv("HTTP_CLIENT_IP")) {
            $cip = getenv("HTTP_CLIENT_IP");
        } else {
            $cip = "unknown";
        }
        return $cip;
    }


    /**
     *  作用：格式化参数，签名过程需要使用
     */
    public function formatBizQueryParaMap($paraMap, $urlencode){
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v){
            if($urlencode){
                $v = urlencode($v);
            }
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar="";
        if (strlen($buff) > 0){
            $reqPar = substr($buff, 0, strlen($buff)-1);
        }
        return $reqPar;
    }



    /**
     * 查询订单状态
     * @param $transaction_id
     * @return string
     */
     public function getPayStatus($transaction_id)
    {
        $url = "https://api.mch.weixin.qq.com/pay/orderquery";
        $onoce_str = $this->createNoncestr();//随机字符串
        $data["appid"] = config('weixinpay.appid');
        $data["mch_id"] = config('weixinpay.mch_id');
        $data["nonce_str"] = $onoce_str;
        $data["out_trade_no"] = $transaction_id;//订单号
        $sign = $this->getSign($data);//同样的签名方法
        $data["sign"] = $sign;//
        $xml = $this->arrayToXml($data);
        $response = $this->postXmlCurl($xml, $url);

        //将微信返回的结果xml转成数组
        $response = $this->xmlToArray($response);

        /*自己处理，给前台怎么方便怎么写*/
        if(!empty($response['trade_state'])&&$response['trade_state']=="SUCCESS")
        {
             $status=1;
        }else{
             $status=0;
        }
        return $status;

    }
}